The Bay Area’s Go-To Contractor for Custom Home & Room Addition Solutions

Does your home lack the space that you and your family need? If so, Keycon, Inc. is here to help. As a full-service remodeling contractor with over four decades of experience providing complete design-build services for California homeowners, we’re the company to trust when you’re ready to add valuable square footage to your South Bay home. We’ll help you find the perfect solution to unlock your home’s potential, allowing you to build a beautiful life and make the most of your upgraded space.  

Explore Our Home Addition Services

At Keycon, we’re proud to be the Bay Area’s No. 1 Eichler remodeler. While we specialize in the preservation and renewal of these iconic homes, we also offer exceptional service for homes of all styles—including contemporary, traditional, and transitional. No matter what type of home you own, you can count on us to design, plan, and construct the perfect home addition or room addition to fit your needs. We’re committed to working collaboratively with our clients, tailoring every project to suit their individual goals, requirements, and budget. The possibilities for your home addition are endless, as we can:

  • Add new rooms onto your home
  • Move, tear down, or build new walls
  • Create an additional dwelling unit (ADU)
  • Install new plumbing and electrical elements  

Our design-build approach gives you the advantage of working with one direct line of contact throughout every stage of your remodel. Whether you want to add an extra bedroom so that guests have a comfortable place to stay, a new bathroom to prevent any mishaps during busy mornings, or just some extra space so that your growing family can enjoy your home to the fullest, we have you covered.  

Get Your Home Addition Project Started

Discover the difference of working with a local design-build remodeling company you can trust when you partner with Keycon, Inc. for your home addition project. Contact us today to learn more about our services and to start exploring the possibilities for your South Bay, CA, home.  

Five-Star Reviews

What Our Clients Are Saying

Our team is committed to achieving complete customer satisfaction, and our reviews are proof of that commitment. Take a look at what a few of our previous customers have to say about working with us.
Overall performance was excellent, and they were our most detail-oriented contractors -- and always provided excellent advice. They were very good at steering us away from mistakes, but also at working with our specific style, budget and timeline.

Jeremy P

Tampa, FL

KeyCon is simply the best. The quality of their work is extraordinary and their expertise is outstanding. KeyCon helped us after we were recovering from a  fire (caused by a Bosch dishwasher). KeyCon understood everything we needed to do regarding code upgrades and helped us to anticipate and avoid problems. They also helped us prepare all the documents we needed for the insurance company. Their people are great, responsive, talented, and fast.  Our new kitchen is beautiful. KeyCon may be the best company i have ever had the privilege to hire. Go with KeyCon!


Tampa, FL

The people from Keycon were on time and paid attention to details we thought were important. They did a great job and their people were wonderful. When I asked one of them to return there was no problem.Would give them a 5 of 5.

Myron S

Tampa, FL